611666555506 has 16 divisors (see below), whose sum is σ = 971562366720. Its totient is φ = 287815839040.

The previous prime is 611666555497. The next prime is 611666555519. The reversal of 611666555506 is 605555666116.

611666555506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×611666555506³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484666 + ... + 1207573.

It is an arithmetic number, because the mean of its divisors is an integer number (60722647920).

Almost surely, 2^611666555506 is an apocalyptic number.

611666555506 is a deficient number, since it is larger than the sum of its proper divisors (359895811214).

611666555506 is a wasteful number, since it uses less digits than its factorization.

611666555506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702889.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 611666555506 in words is "six hundred eleven billion, six hundred sixty-six million, five hundred fifty-five thousand, five hundred six".